* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
}

header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #333;
}

main {
    margin-top: 60px;
}

section {
    padding: 4rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.hero {
    text-align: center;
    padding: 6rem 5%;
    background-color: #f5f5f5;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-button {
    padding: 0.8rem 2rem;
    font-size: 1.1rem;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 2rem;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.service-card {
    padding: 2rem;
    background-color: #f8f9fa;
    border-radius: 10px;
    text-align: center;
}

.contact form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 600px;
    margin: 2rem auto;
}

input, textarea {
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
}

textarea {
    height: 150px;
}

button[type="submit"] {
    padding: 0.8rem;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

footer {
    text-align: center;
    padding: 2rem;
    background-color: #333;
    color: white;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
} 